﻿.lst0707 #flexbox {
    display: -ms-flexbox;
    -ms-flex-pack: distribute;
    width: 800px;
    height: 300px;
    border: 3px solid lightgray;
}

.lst0707 #flexbox > div {
    border: 1px solid black;
    min-height: 100px;
    margin: 5px;
}

    .lst0707 #flexbox > div:nth-child(odd) {
        -ms-flex: 1;
    }

    .lst0707 #flexbox > div:nth-child(even) {
        -ms-flex: 2;
    }
